Recibo un error esporádico que es difícil de reproducir. Mi primera suposición es que de alguna manera tengo una sesión de nhibernate con fugas, sin embargo, cuando ejecuté el nhibernate profiler, no vi nada fuera de lo común.NHibernate: excepción de System.Argument: un elemento con la misma clave ya se ha agregado
- MVC 2,0
- versión Fluido versión 1.1.0.685
- NHibernate 2.1.2.4000
Excepción: System.ArgumentException: un elemento con la misma clave ya ha sido añadido .
Seguimiento de la pila: en System.Collections.Generic.Dictionary
2.Insert(TKey key, TValue value, Boolean add) at NHibernate.Util.ThreadSafeDictionary2.Add (TKey clave, valor TValue) en NHibernate.SqlTypes.SqlTypeFactory.GetTypeWithLen [T] (Int32 longitud, TypeWithLenCreateDelegate CreateDelegate) a NHibernate.Type.EnumStringType..ctor (Tipo enumClass, longitud Int32)
estoy usando un modelo de repositorio. Aquí está mi clase de repositorio.
public sealed class Repository<T> : IRepository<T> where T : CoreObjectBase
{
#region IRepository<T> Members
private ISession Session
{
get
{
return new SessionHelper().GetSession();
}
}
public IQueryable<T> GetAll()
{
return (from entity in Session.Linq<T>() select entity);
}
public T GetById(int id)
{
return Session.Get<T>(id);
}
public void Save(params T[] entities)
{
using (ITransaction tx = Session.BeginTransaction())
{
for (int x = 0; x < entities.Count(); x++)
{
var entity = entities[x];
entity.Validate();
Session.SaveOrUpdate(entities[x]);
if (x == entities.Count() - 1 || (x != 0 && x % 20 == 0)) //20 is the batch size
{
Session.Flush();
Session.Clear();
}
}
tx.Commit();
}
}
public void SaveWithDependence<K>(T entity, K dependant) where K : CoreObjectBase
{
entity.Validate();
dependant.Validate();
using (ITransaction tx = Session.BeginTransaction())
{
Session.SaveOrUpdate(entity);
Session.SaveOrUpdate(dependant);
tx.Commit();
}
}
public void Save(T entity)
{
entity.Validate();
using (ITransaction tx = Session.BeginTransaction())
{
Session.SaveOrUpdate(entity);
tx.Commit();
}
}
public void Delete(T entity)
{
using (ITransaction tx = Session.BeginTransaction())
{
Session.Delete(entity);
tx.Commit();
}
}
public T GetOne(QueryBase<T> query)
{
var result = query.SatisfyingElementFrom(Session.Linq<T>());
return result;
//return query.SatisfyingElementFrom(Session.Linq<T>());
}
public IQueryable<T> GetList(QueryBase<T> query)
{
return query.SatisfyingElementsFrom(Session.Linq<T>());
}
/// <summary>
/// remove the sepcific object from level 1 cache so it can be refreshed from the database
/// </summary>
/// <param name="entity"></param>
public void Evict(T entity)
{
Session.Evict(entity);
}
#endregion
}
Y aquí está mi sesión de ayudante, adaptación de this.
public sealed class SessionHelper
{
private static ISessionFactory _sessionFactory;
private static ISession _currentSession;
public ISession GetSession()
{
ISessionFactory factory = getSessionFactory();
ISession session = getExistingOrNewSession(factory);
return session;
}
private ISessionFactory getSessionFactory()
{
if (_sessionFactory == null)
{
_sessionFactory = BuildSessionFactory();
}
return _sessionFactory;
}
private ISessionFactory BuildSessionFactory()
{
return Fluently.Configure().Database(
FluentNHibernate.Cfg.Db.MsSqlConfiguration.MsSql2005
.ConnectionString(c => c
.FromConnectionStringWithKey("MyDatabase"))
.AdoNetBatchSize(20))
.Mappings(m => m.FluentMappings.AddFromAssemblyOf<SessionHelper>())
.BuildSessionFactory();
}
private ISession getExistingOrNewSession(ISessionFactory factory)
{
if (HttpContext.Current != null)
{
ISession session = GetExistingWebSession();
if (session == null)
{
session = openSessionAndAddToContext(factory);
}
else if (!session.IsOpen)
{
session = openSessionAndAddToContext(factory);
}
return session;
}
if (_currentSession == null)
{
_currentSession = factory.OpenSession();
}
else if (!_currentSession.IsOpen)
{
_currentSession = factory.OpenSession();
}
return _currentSession;
}
public ISession GetExistingWebSession()
{
return HttpContext.Current.Items[GetType().FullName] as ISession;
}
private ISession openSessionAndAddToContext(ISessionFactory factory)
{
ISession session = factory.OpenSession();
HttpContext.Current.Items.Remove(GetType().FullName);
HttpContext.Current.Items.Add(GetType().FullName, session);
return session;
}
}
¿Alguna idea o sugerencia para evitar este problema?
Josh, ¿hace que su thread SessionHelper sea seguro? –